Bump version of update-rust-toolchain GitHub Action to fix bug

Fixes #1146.

Author: alexdewar

.github/workflows/update-rust-toolchain.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           persist-credentials: false
       - name: update rust toolchain
-        uses: a-kenji/update-rust-toolchain@v1
+        uses: a-kenji/update-rust-toolchain@v1.1
         with:
           toolchain-path: ./rust-toolchain.toml
           token: ${{ secrets.GH_TOKEN_FOR_UPDATES }}